Necrotizing small bowel colitis in 27-week preterm infants can be treated by fasting, intravenous fluid supplementation and maintenance of nutrition, and surgical treatment. 1. Fasting: 27 weeks preterm necrotizing small bowel colitis, due to the child’s own intestinal function is still relatively weak and no intestinal flora, there is no resistance. The first step of treatment is fasting, so as to depressurize the gastrointestinal tract, avoid further destruction of the intestinal tract, and give the intestinal mucosa a certain amount of time to repair. 2. Intravenous fluid supplementation and maintenance of nutrition: necrotizing small bowel colitis in 27-week preterm infants can cause a large amount of fluid loss due to extensive intestinal inflammation. Timely intravenous fluid supplementation is needed to maintain the balance of water and electrolytes in the body. And the child needs to be fasted, and intravenous fluid replacement during fasting can maintain the nutrition needed by the child. 3. Surgery: When the condition of necrotizing small bowel colitis in 27-week preterm infants is more serious, open abdominal surgery is needed to quickly remove the lesions and avoid deterioration of the condition. Necrotizing small bowel colitis in 27-week preterm infants, need to go to the regular hospital to actively cooperate with professional doctors for related treatment, to avoid causing delays in the condition.